Calculation method for heating plan, program, recording medium, device, deformation method, plate deformation device, and production method for deformed plate

Abstract

To provide a calculation method that enables a heating plan for approximating a plate to an intended shape to be calculated in a short period of time.A calculation method according to the present invention is a calculation method of a heating plan for deforming a plate by heating, the calculation method including: a Bayesian optimization step of performing a Bayesian optimization by inputting a training data group including a plurality of combinations of heating conditions that include a heating shape having been set at an arbitrary location of an analysis model for an original shape being a shape of the plate and a shape that has been calculated based on the heating conditions and determining a heating conditions candidate; and a finite element analysis step of converting the heating conditions candidate into strain data and performing a structural analysis based on a finite element method by inputting the strain data to output a shape candidate.

1 . A calculation method of a heating plan for deforming a plate by heating, the calculation method comprising:
 a Bayesian optimization step of performing a Bayesian optimization by inputting a training data group including a plurality of combinations of heating conditions that include a heating shape having been set at an arbitrary location of an analysis model for an original shape being a shape of the plate and an assessed value of a deformed shape that has been calculated based on the heating conditions and determining a heating conditions candidate; and   a finite element analysis step of converting the heating conditions candidate into strain data and performing a structural analysis based on a finite element method by inputting the strain data to output a shape candidate.   
     
     
         2 . The calculation method according to  claim 1 , comprising a training data group output step of outputting the heating conditions and the deformed shape by deformation prediction using a neural network. 
     
     
         3 . The calculation method according to  claim 1 , comprising:
 a Bayesian optimization step of performing the Bayesian optimization with the shape candidate obtained in the finite element analysis step as the original shape and determining a next heating conditions candidate; and   a finite element analysis step of converting the next heating conditions candidate into strain data and performing a structural analysis based on a finite element method by inputting the strain data to output a next shape candidate.   
     
     
         4 . The calculation method according to  claim 3 , wherein the Bayesian optimization and the subsequent finite element analysis step are repetitively performed with the next shape candidate as the original shape to acquire an intended shape and a plurality of heating conditions candidates for obtaining the intended shape. 
     
     
         5 . The calculation method according to  claim 1 , wherein the heating shape includes a heating wire and the heating conditions include a midpoint of the heating wire, a length of the heating wire, an angle of the heating wire, a heating surface, and a heat input amount. 
     
     
         6 . The calculation method according to  claim 1 , being a calculation method of a heating plan for performing bending work of a plate or strain relief of a plate by heating. 
     
     
         7 . A program for executing the calculation method according to  claim 1 . 
     
     
         8 . A computer-readable recording medium that stores the program according to  claim 7 . 
     
     
         9 . A device comprising a calculating unit that executes acquisition of a heating plan according to the calculation method according to  claim 1 . 
     
     
         10 . The device according to  claim 9 , the device is for calculating a heating plan for deforming a plate by heating, the device comprising:
 a plastic strain estimating module which estimates a plastic strain based on heating conditions inputted by a user; and a heating plan calculating module which calculates a heating plan based on a processing object inputted by the user, an intended shape, and the plastic strain.   
     
     
         11 . The device according to  claim 10 , comprising a database creating module which creates a heating conditions database by accumulating, in plurality, the plastic strain estimated by the plastic strain estimating module, wherein in the heating plan calculating module, a heating plan is calculated based on a processing object inputted by the user, an intended shape, and the heating conditions database. 
     
     
         12 . A deformation method of heating and deforming a plate based on a heating plan calculated by the calculation method according to  claim 1 . 
     
     
         13 . A plate deformation device equipped with a program for executing the deformation method according to  claim 12 . 
     
     
         14 . A plate deformation device comprising a heating unit that heats a plate and a control unit that controls a deformation device, wherein the control unit is provided so as to be capable of reading the heating plan according to  claim 1 . 
     
     
         15 . The plate deformation device according to  claim 14 , comprising: deforming means (A) which heats a plate using an n-th heating conditions candidate outputted by an n-th (n≥1) attempt to deform the plate: measuring means which measures a three-dimensional shape of the deformed plate; comparing means which compares the measured three-dimensional shape of the plate and an n-th shape candidate that is an analysis result of a finite element structural analysis performed in the n-th attempt with each other; and deforming means (B) which heats the plate based on a result of the comparison so that a three-dimensional shape of the plate approximates the analysis result. 
     
     
         16 . A production method for a deformed plate comprising a step of heating and deforming a plate based on a heating plan calculated by the calculation method according to  claim 1 . 
     
     
         17 . The calculation method according to  claim 1 , comprising entering an intended shape of the plate that is a processing object when using the calculation method of the heating plan. 
     
     
         18 . The calculation method according to  claim 1 , the training data group comprises an analysis model of an intended shape of the plate that is a processing object.